Extended Bezerks

So I do alright in tournaments, but not great. Some of the reasons are because of my skill level, my bluffs dont work some times, montanas, they out bluff me, montanas, etc etc.

Here is my current deck. I know I want spyke. Don't know who I want to replace him with. And I want advice on the other cards as well. Also, I want to stay a pure Berzerk deck. It seems to suit me well.